hard Set 67 Form Exercise

Number Chain: 9 → -5 → +6 → x5 → +11 → x5 → ?

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Answer: 305

SubType
number-chain
Start
9
Steps
  • {"op":"-","operand":5}
  • {"op":"+","operand":6}
  • {"op":"x","operand":5}
  • {"op":"+","operand":11}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 3 → x4 → +6 → x4 → -14 → -24 → ?

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Answer: 34

SubType
number-chain
Start
3
Steps
  • {"op":"x","operand":4}
  • {"op":"+","operand":6}
  • {"op":"x","operand":4}
  • {"op":"-","operand":14}
  • {"op":"-","operand":24}
Difficulty
hard

Number Chain: 5 → -1 → -2 → +6 → x4 → +2 → ?

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Answer: 34

SubType
number-chain
Start
5
Steps
  • {"op":"-","operand":1}
  • {"op":"-","operand":2}
  • {"op":"+","operand":6}
  • {"op":"x","operand":4}
  • {"op":"+","operand":2}
Difficulty
hard

Number Chain: 7 → -6 → -1 → x2 → -1 → x4 → ?

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Answer: -4

SubType
number-chain
Start
7
Steps
  • {"op":"-","operand":6}
  • {"op":"-","operand":1}
  • {"op":"x","operand":2}
  • {"op":"-","operand":1}
  • {"op":"x","operand":4}
Difficulty
hard

Number Chain: 10 → x4 → x3 → -18 → -33 → +11 → ?

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Answer: 80

SubType
number-chain
Start
10
Steps
  • {"op":"x","operand":4}
  • {"op":"x","operand":3}
  • {"op":"-","operand":18}
  • {"op":"-","operand":33}
  • {"op":"+","operand":11}
Difficulty
hard

Number Chain: 10 → x4 → -36 → x3 → +4 → x2 → ?

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Answer: 32

SubType
number-chain
Start
10
Steps
  • {"op":"x","operand":4}
  • {"op":"-","operand":36}
  • {"op":"x","operand":3}
  • {"op":"+","operand":4}
  • {"op":"x","operand":2}
Difficulty
hard

Number Chain: 2 → x5 → +4 → +11 → x3 → +11 → ?

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Answer: 86

SubType
number-chain
Start
2
Steps
  • {"op":"x","operand":5}
  • {"op":"+","operand":4}
  • {"op":"+","operand":11}
  • {"op":"x","operand":3}
  • {"op":"+","operand":11}
Difficulty
hard

Number Chain: 4 → x4 → +10 → -2 → +5 → +9 → ?

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Answer: 38

SubType
number-chain
Start
4
Steps
  • {"op":"x","operand":4}
  • {"op":"+","operand":10}
  • {"op":"-","operand":2}
  • {"op":"+","operand":5}
  • {"op":"+","operand":9}
Difficulty
hard